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Type: Posts; User: JLHW

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1. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by JLHW
Replies
12
Views
574

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Then we focus on the P1dB simulation first:

If my LNA is operating at 60 GHz, should I put frf1 = 60 GHz for my hb analysis?
2. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by JLHW
Replies
12
Views
574

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Okay, so right now, I have two testbenches for the same LNA circuit, one for P1dB sim, another for IP3.

for P1dB, I've set my frf1 variable in ADE as 60 GHz and for IP3, frf1=59.5 GHz, frf2=59 GHz...
3. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by JLHW
Replies
12
Views
574

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Alright, thanks for the clarification, then I'll leave my IP3 plot as it is shown here.

BTW, If I set the frequency for P1dB plot at 60 GHz, will the P1dB curve contradict with my current setup...
4. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by JLHW
Replies
12
Views
574

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Thanks

I've tested with other values by playing with other harmonics within the bandwidth in the direct plot form, and the results will differ, so may I know how can we decide which harmonics to...
5. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by JLHW
Replies
12
Views
574

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Okay, I've chosen f1=59.5 GHz and f2=59 GHz and run the hb analysis. Then at the main form, I chose 59.5 GHz as 1st order freq and 60.5 GHz as 3rd order freq, the result is as shown:

155717

May...
6. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by JLHW
Replies
12
Views
574

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

My bandwidth is (65.97-52.17) GHz = 13.8 GHz

May I know how to determine whether OIP3 falls into bandwidth?
7. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by JLHW
Replies
12
Views
574

### Closed: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Hi, rookie post here, the LNA I'm simulating in Cadence ADE is operating at a carrier frequency of 60 GHz. I'm using hb analysis.

I'm aware of the formula 2f1 - f2 = fc, but:

1. Is there a...
8. ## Thread: Problems in Verifying Silterra Library Cells using Calibre

by JLHW
Replies
0
Views
156

### Closed: Problems in Verifying Silterra Library Cells using Calibre

Hi, I'm using Calibre in Cadence Virtuoso to verify my layout using Silterra's PDK. I have acquired all four DRC and LVS/PEX runset and header TXT files, but all of them could not be loaded inside...
9. ## Thread: W/L of pMOS and nMOS of CD4007 Chip.

by JLHW
Replies
3
Views
309

### Closed: Re: W/L of pMOS and nMOS of CD4007 Chip.

Did some quick digging and found this, your answer should be in page 7: https://people.rit.edu/lffeee/CD4007_SPICE_MODEL.pdf

PMOS:

W = 360 um, L = 10 um

nMOS:

W = 170 um, L = 10 um
10. ## Thread: Error and Questions related to Calibre 2015 in Cadence

by JLHW
Replies
0
Views
196

### Closed: Error and Questions related to Calibre 2015 in Cadence

Hi, the PDK I currently use supports Calibre, but their header and runset file for DRC and LVS are all in TXT format (4 files in total), may I know are text files supported by Calibre?

Also, when...
11. ## Thread: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

by JLHW
Replies
7
Views
534

### Closed: Re: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

So hypothetically, if I remove the feedlines in SCI (only the oval shapes are left), will the simulation results be the same with my previous simulations in Sonnet?

Speaking of which, these...
12. ## Thread: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

by JLHW
Replies
7
Views
534

### Closed: Re: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

there are arrows in all inductors in xgeom, in fact, all of them are synthesised by your spiral inductor assistant and come with the arrows by default.

154839

Besides, in SCI, I've taken...
13. ## Thread: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

by JLHW
Replies
7
Views
534

### Closed: Re: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

The feedlines are the same as I imported their gdsII from Sonnet.

not sure about the de-embedding settings and different equations, may I know where to check it?

(edit: the equations I used are...
14. ## Thread: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

by JLHW
Replies
7
Views
534

### Closed: Simulation discrepancies between Sonnet (standalone) and Sonnet Cadence Interface

Hi,

As per title, I am simulating four custom inductors that'll operate at their target inductance at 60 GHz. All simulations are satisfactory when using Sonnet by itself, however when I...
15. ## Thread: Questions in manually creating substrate files for Sonnet Cadence Interface

by JLHW
Replies
0
Views
358

### Closed: Questions in manually creating substrate files for Sonnet Cadence Interface

Hi everyone,

I've successfully simulated several inductors in Sonnet and is moving on to re-simulate them using Sonnet Cadence Interface and integrate them into my LNA in Cadence Virtuoso for...
16. ## Thread: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

by JLHW
Replies
7
Views
591

### [SOLVED]Closed: Re: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

Agreed, especially when I have only 4GB of soldered RAM on my laptop, I had to configure my simulation to output relatively accurate results while using just below my RAM limit. Compromises had to be...
17. ## Thread: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

by JLHW
Replies
7
Views
591

### [SOLVED]Closed: Re: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

Wow, that's an impressive amount of RAM, and even that was still not enough for you! May I know how large is the structure?
18. ## Thread: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

by JLHW
Replies
7
Views
591

### [SOLVED]Closed: Re: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

Thanks for the reply! I'm aware that I can reduce RAM usage by using conformal mesh and increase the size of the mesh, I'm just curious whether anyone here had hit high RAM usage for their projects,...
19. ## Thread: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

by JLHW
Replies
7
Views
591

### [SOLVED]Closed: [DISCUSSION] Maximum ram usage for Sonnet/HFSS simulation

Hi, I'm just curious, what are your maximum used RAM for the projects you've been simulated for either/both software?

Is it possible to achieve extreme RAM usage, like 64 GB or above for a single...
20. ## Thread: Questions for Dr. Mühlhaus Spiral Inductor Assistant for Sonnet

by JLHW
Replies
3
Views
408

### [SOLVED]Closed: Re: Questions for Dr. Mühlhaus Spiral Inductor Assistant for Sonnet

Say I created four single-turn round (stadium) inductors to operate at 60 GHz, all within 68 pH to 104 pH, and I've simulated them with Sonnet, they somehow reached my targeted inductance with decent...
21. ## Thread: Questions for Dr. Mühlhaus Spiral Inductor Assistant for Sonnet

by JLHW
Replies
3
Views
408

### [SOLVED]Closed: Questions for Dr. Mühlhaus Spiral Inductor Assistant for Sonnet

Hi, I'm designing custom inductors using Spiral Inductor Assistant for Sonnet. Below are my questions:

1. For "round differential" inductors, if i'm creating a single-turn inductor, why does the...

by JLHW
Replies
5
Views
3,820

UPDATE:

I've somehow solved the problem.

What I did:

1. In .bashrc, I've typed the wrong directory at the MMSIM lines, so I've changed the part as shown below (some paths may be redundant):...

by JLHW
Replies
5
Views
3,820

If I enter "which spectre", the terminal returned:

[JLHW@jlhw opt]\$ which spectre
/usr/bin/which: no spectre in...

by JLHW
Replies
5
Views
3,820

by JLHW
Replies
5
Views
3,820